Procapil Shampoo It helps to reduce the aging of hair fibers with its procapil biotin and horse tail antioxidants and cell extract formula. With its intense keratin support, its stimulating effect on hair follicles, in 3 months of regular use, not only reduces the rate of hair loss, but also supports the formation of new hair strands. These interactions result in an increase in stronger, healthier and faster growing hair.